public static WholeNumber Generate(IEnumerable <Token> tokens,
out IEnumerable <Token> process)
{
IEnumerable <Token> left = null;
DigitSequence digits = DigitSequence.Generate(tokens, out left);
if (digits != null)
{
process = left;
return(new WholeNumber(digits));
}
process = null;
return(null);
}
public static Fractional Generate(IEnumerable <Token> tokens)
{
if (tokens.Any())
{
if (tokens.First() is FullStop)
{
IEnumerable <Token> processed = null;
DigitSequence digit = DigitSequence.Generate(
tokens.Skip(1), out processed);
if (digit != null && !processed.Any())
{
return(new Fractional(new FullStop(), digit));
}
}
}
return(null);
}